You might need to reinstall Terminal Services client access licenses (TS CALs) in certain disaster recovery or upgrade situations. For example, you will need to reinstall TS CALs if you experience a catastrophic failure or any other event that causes the loss of or corruption to the TS Licensing database, and a known good backup is not available.

For more information about repeating the installation of TS CALs in disaster recovery or upgrade situations, see the Terminal Services page on the Windows Server 2008 TechCenter (http://go.microsoft.com/fwlink/?LinkId=73931).